Sprinkler head



April 6, 1943- F. FERRANDO ET Al. 2,315,844

SPRINKLER HEAD Filed Jan. '19, 1942 Il@ il INVENTORS BY fpm-Jr ,jv

-A-rrogmav Patented Apr. 6, 1943 SPRINKLER HEAD Francesco Ferrando and Giuseppe Ferrando, Menlo Park, Calif.

Application January 19, 1942, Serial No. 427,358

1 Claim.

The present invention relates particularly to that form of sprinkler head commonly used in the distribution of water over lawns, but that may readily be adapted to other applications such as fire extinguishing installations, reference being made to our copending applications bearing Serial No. 363,510, filed October 30, 1940, now Patent No. 2,273,401, and Serial No. 389,929, filed April 23, 1941, now Patent No. 2,297,052.

One of the faults to .be found with many prior known rotary sprinkler heads, is the diiiiculty of properly lubricating them and retaining the lubrication where some form of lubricating grease or oil is used, since the bearings are more or less exposed to the current of Water through the sprinkler head, resulting in the washing out o-f the lubricant from the bearing.

The principal object of the present invention is, therefore, to provide a sprinkler head of the type indicated Where in the rotating part will rotate freely and easily without the use of roller or other type of so-called anti-friction bearings, and without the Customary greasing or oiling, freedom cf rotation Ibeing secured through the assembly disclosed and water lubrication.

It is another object of the invention to provide a s-prinkler head constructed and arranged in such a manner as to prevent the entrance of sand in any noticeable quantity between the rotating and non-rotating parts, and to permit the easy escape of any minute quantity of sand that might enter between said parts.

It is also an object of the invention to provide a structure of the character indicated that will be extremely simple in construction and assembly,

economical to manufacture, strong, durable, and

highly efficient in its practical application.

In the drawing:

Figure 1 is a longitudinal section through the center of the device, partly in elevation.

Figure 2 is a top plan view of the same.

Figure 3 is an enlarged view of a Vportion of the section shown in Figure l.

Figure 4 is a sectional View of the device on line 4-4 of Figure 3.

Referring now more particularly to the drawing, we show at I the base member which may be mounted on any suitable liquid-delivery means through the medium of the threaded portion shown at 2.

The member I is tubular in form, having the end portion remote from part 2 of somewhat smaller diameter as shown at 3 and forming a shoulder at 4. The extreme end of this reduced portion is externally threaded as at 5, and on this threaded end is screwed a washer 6 and nut l. The nut I is larger in diameter than the body of tubular part 3 and is provided with a recess 8 for the purpose hereinafter described.

At 9 is shown a sleeve having an internal diameter slightly greater than the outer diameter of part 3 so that it may rotate freely thereon, the ease and freedom of rotation being augmented by the Water which makes its way between the two parts and provides the desired lubrication.

The sleeve 9 is preferably somewhat shorter than the part 3, and has its top edge bevelled as at I0 to correspond to the bevelled side II of the recess 8 in nut 'L On the shoulder 4 and bearing upwardly against the bottom edge of the sleeve 9 is a spring I2. This spring barely overcomes the weight of the parts superimposed thereon. When the sprinkler head is in use the force of the water discharged therethrough will hold the bevelled edge I0 more or less snugly against the washer 6 and bevelled edge II of nut l, and when the ow of water stops the spring I2 will support the parts in thesame position, vbut some water finds its Way between the sleeve 9 and part 3 to provide the desired lubrication without permitting the entrance of any sand. The resiliency of the spring I2 is slight and some vertical play of the sleeve 9 is permitted. For instance, when the water pressure is shut oi the weight imposed on the spring I2 is sufficient to depress the same until the water in the rotating parts drains away.

-At I3 is shown a cap member threaded on to the exterior of the top end of sleeve 9 as at I4 and having a chamber I5 formed therein having open communication with the conduit I6 in part 3.

Threaded angularly into opposite sides of the cap I3, and to communicate with the chamber I5, are nipples I1 which in turn communicate with jet tubes as I8 secured to the ends thereof by means of unions I9 which permit the adjustment of the tubes I8 to discharge in any direction. The forcible discharge of water in jets from the tubes I8 reacts to cause the rotation of the member including the parts 9, I3, I1, I8 and I9. The top end of the cap I3 may have orifices as 20 formed therein to permit the formation of a central spray, but in any case the pressure of water in chamber I5 when the device is in use, is sufcient to raise the sleeve 9 into the yposition hereinbefore described.

Where the liquid to Ibe sprayed is free of any abrading substance or material such as sand, then the spring I2 and even the special formation of the top end of sleeve 9 may be omitted.

end between said shoulder and sto-p, resilient means disposed between the sleeve and shoulder to urge the sleeve toward said stop, and spraying means mounted on said sleeve to rotate yand move as a unit therewith.

FRANCESCO FERRANDO. GIUSEPPE FERRANDO. 

